Monitoring vegetation productivity at extremely fine resolutions is valuable for real-world agricultural applications, such as detecting crop stress and providing early warning of food insecurity. Solar-Induced Chlorophyll Fluorescence (SIF) provides a promising way to directly measure plant productivity from space. However, satellite SIF observations are only available at a coarse spatial resolution, making it impossible to monitor how individual crop types or farms are doing. This poses a challenging coarsely-supervised regression (or downscaling) task; at training time, we only have SIF labels at a coarse resolution (3km), but we want to predict SIF at much finer spatial resolutions (e.g. 30m, a 100x increase). We also have additional fine-resolution input features, but the relationship between these features and SIF is unknown. To address this, we propose Coarsely-Supervised Smooth U-Net (CS-SUNet), a novel method for this coarse supervision setting. CS-SUNet combines the expressive power of deep convolutional networks with novel regularization methods based on prior knowledge (such as a smoothness loss) that are crucial for preventing overfitting. Experiments show that CS-SUNet resolves fine-grained variations in SIF more accurately than existing methods.
University of Shanghai for Science and Technology（上海理工大学）；Indiana University Bloomington（印第安纳大学伯明顿分校）；Tianjin University（天津大学）；Suffolk University（萨福克大学）
Vegetation is the natural linkage connecting soil, atmosphere and water. It can represent the change of land cover to a certain extent and serve as an indicator for global change research. Methods for measuring coverage can be divided into two types: surface measurement and remote sensing. Because vegetation cover has significant spatial and temporal differentiation characteristics, remote sensing has become an important technical means to estimate vegetation coverage. This paper firstly uses U-net to perform remote sensing image semantic segmentation training, then uses the result of semantic…
Universidade Federal de Minas Gerais（米纳斯吉拉斯联邦大学）；University of Campinas（坎皮纳斯大学）；Universidade Estadual Paulista（圣保罗州立大学）；University of Stirling（斯特灵大学）
Plant phenology studies rely on long-term monitoring of life cycles of plants. High-resolution unmanned aerial vehicles (UAVs) and near-surface technologies have been used for plant monitoring, demanding the creation of methods capable of locating and identifying plant species through time and space. However, this is a challenging task given the high volume of data, the constant data missing from temporal dataset, the heterogeneity of temporal profiles, the variety of plant visual patterns, and the unclear definition of individuals' boundaries in plant communities. In this letter, we propose a…
LASTIG, Univ. Gustave Eiffel, IGN-ENSG（古斯塔夫·埃菲尔大学LASTIG实验室，法国国家地理与林业信息学院）；INRAE, UMR 1202 BIOGECO, Université de Bordeaux（法国国家农业食品与环境研究院，波尔多大学生物地球化学与生态学联合研究中心）；EA G&E Bordeaux INP, Université Bordeaux Montaigne（波尔多蒙田大学，波尔多国立高等电子、计算机、电信、数学与机械学院环境与地理空间工程研究团队）
We propose a new deep learning-based method for estimating the occupancy of vegetation strata from airborne 3D LiDAR point clouds. Our model predicts rasterized occupancy maps for three vegetation strata corresponding to lower, medium, and higher cover. Our weakly-supervised training scheme allows our network to only be supervised with vegetation occupancy values aggregated over cylindrical plots containing thousands of points. Such ground truth is easier to produce than pixel-wise or point-wise annotations. Our method outperforms handcrafted and deep learning baselines in terms of precision b…
Vegetation Indices based on paired images of the visible color spectrum (VIS) and near infrared spectrum (NIR) have been widely used in remote sensing applications. These vegetation indices are extended for their application in autonomous driving in unstructured outdoor environments. In this domain we can combine traditional vegetation indices like the Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) with Convolutional Neural Networks (CNNs) pre-trained on available VIS datasets. By laying a focus on learning calibrated CNN outputs, we can provide an approach t…
Sentinel-2 multi-spectral images collected over periods of several months were used to estimate vegetation height for Gabon and Switzerland. A deep convolutional neural network (CNN) was trained to extract suitable spectral and textural features from reflectance images and to regress per-pixel vegetation height. In Gabon, reference heights for training and validation were derived from airborne LiDAR measurements. In Switzerland, reference heights were taken from an existing canopy height model derived via photogrammetric surface reconstruction. The resulting maps have a mean absolute error (MA…
AquaCluster: Using Satellite Images And Self-supervised Machine Learning Networks To Detect Water Hidden Under Vegetation
Division of Water and Environmental Engineering, KTH Royal Institute of Technology（水与环境工程系，皇家理工学院）；Division of Software and Computer Systems, KTH Royal Institute of Technology（软件与计算机系统系，皇家理工学院）；Department of Physical Geography, Stockholm University（物理地理系，斯德哥尔摩大学）
Multi-modal learning for geospatial vegetation forecasting
Max-Planck-Institute for Biogeochemistry（马克斯·普朗克生物地球化学研究所）；ELLIS Unit Jena（耶拿ELLIS单元）；ETH Zürich（苏黎世联邦理工学院）；Hong Kong University of Science and Technology（香港科技大学）
Efficient Spatio-Temporal Vegetation Pixel Classification with Vision Transformers
Department of Computing, Federal University of São Carlos (UFSCar)（计算机系，萨o卡罗斯联邦大学）；Center for Research on Biodiversity Dynamics and Climate Change and Department of Biodiversity, Bioscience Institute, São Paulo State University (UNESP)（生物多样性动态与气候变化研究中心和生物多样性系，圣保罗州立大学）；Brazilian Agricultural Research Corporation (EMBRAPA)（巴西农业研究 corporation）；Wageningen University & Research (WUR)（瓦赫宁根大学与研究）
Self-supervised Learning for Hyperspectral Images of Trees
1 Department of Computer Science, University of Texas at El Paso, El Paso, TX 79968, USA 2 School of Sustainable Engineering；Built Environment, Arizona State University, Tempe, AZ 85281, USA 3 Texas A\&M AgriLife Research, Texas A\&M University, El Paso, TX 79927, USA；Texas A\&M AgriLife Research Texas A\&M University；Department of Computer Science University of Texas at El Paso；1 Department of Computer Science, University of Texas at El Paso, El Paso, TX 79968, USA；2 School of Sustainable Engineering；Built Environment, Arizona State University, Tempe, AZ 85281, USA；3 Texas A\&M AgriLife Research, Texas A\&M University, El Paso, TX 79927, USA；Texas A\&M AgriLife Research；Texas A\&M University；Department of Computer Science；University of Texas at El Paso
Politecnico di Torino（都灵理工大学）；Politecnico Interdepartmental Centre for Service Robotics（都灵理工大学跨部门服务机器人中心）；Università degli Studi di Torino（都灵大学）；Institute of Electronics, Computer and Telecommunication Engineering of the National Research Council of Italy（意大利国家研究委员会电子、计算机与电信工程研究所）
Precision agriculture is considered to be a fundamental approach in pursuing a low-input, high-efficiency, and sustainable kind of agriculture when performing site-specific management practices. To achieve this objective, a reliable and updated description of the local status of crops is required. Remote sensing, and in particular satellite-based imagery, proved to be a valuable tool in crop mapping, monitoring, and diseases assessment. However, freely available satellite imagery with low or moderate resolutions showed some limits in specific agricultural applications, e.g., where crops are gr…
Global Rice Multi-Class Segmentation Dataset (RiceSEG): A Comprehensive and Diverse High-Resolution RGB-Annotated Images for the Development and Benchmarking of Rice Segmentation Algorithms
Nanjing Agricultural University（南京农业大学）；The University of Tokyo（东京大学）；Professor Jayashankar Telangana Agricultural State University（贾亚尚卡尔·特伦甘纳农业州立大学）；Kyoto University（京都大学）；Huazhong University of Science and Technology（华中科技大学）；Huazhong Agricultural University（华中农业大学）；Chinese Academy of Agricultural Sciences（中国农业科学院）；Chinese Academy of Science（中国科学院）；Shenyang Agricultural University（沈阳农业大学）；Jilin Academy of Agricultural Sciences（吉林省农业科学院）；Yuan Long Ping High-Tech Agriculture Co., Ltd.（袁隆平高科技农业有限公司）
Beijing University of Posts and Telecommunications（北京邮电大学）；Beijing Institute of Technology（北京理工大学）；National and Kapodistrian University of Athens（雅典国立卡波季斯特里安大学）；China Aero Geophysical Survey and Remote Sensing Center for Natural Resources（中国自然资源航空物探遥感中心）；La Trobe University（乐卓博大学）
Extracting roads from high-resolution remote sensing images (HRSIs) is vital in a wide variety of applications, such as autonomous driving, path planning, and road navigation. Due to the long and thin shape as well as the shades induced by vegetation and buildings, small-sized roads are more difficult to discern. In order to improve the reliability and accuracy of small-sized road extraction when roads of multiple sizes coexist in an HRSI, an enhanced deep neural network model termed Dual-Decoder-U-Net (DDU-Net) is proposed in this paper. Motivated by the U-Net model, a small decoder is added …
